This is a mixed set. Half are 1.6 the other half 1.5, all have 7/16 stud journals. The 1.5's are new never installed, the 1.6's have about 10000 miles on them.

$250 shipped or best offer.

 

TTT

 

why would you want a mixed set?

 

Yeah don't think that would work very well

 

You'd want a mixed set if you had heads that had a poor exhaust or intake port to help enhance flow to a more ideal I/E ratio, or were running smaller headers or a cam that was less than ideal. Depends on your situation...

 

Good answer.
The reason I mixed them was because of my cam, I had to much bleed off on my exhaust valve from to high a lift, changing to the 1.5's gained me 15 horses/torque across my power band to the rear wheels. Alot of people run mixed ratio's again it depends on your set up.

 

ttt

 

They also mix the rockers if they have stock press in studs like with the Crane 227 cam and put the 1.5's on the exhaust so the lift will not be to high for the stock studs.